Mobile Application Developer at Talentedge, London Area, £400-£525 per day

Senior Mobile Engineer

Tech: Kotlin / Swift / Flutter / BLE / NFC

Location: Hybrid (Angel, London – 2 - 4 days per month in office)

Contract: Outside IR35 (client is exempt)

Duration: 8–12 weeks

Start: ASAP

Rate: £400 - £525 per day

The Opportunity:

We're partnering with an innovative IoT technology business looking for a Senior Mobile Engineer to lead the build of a brand-new mobile activation app and SDK. This is a greenfield project, replacing a legacy application with a lightweight solution focused on BLE, NFC and background scanning for enterprise customers.

You'll own the project from architecture through to delivery, working directly with the Head of Software in a fast-moving, engineering-led environment.

What You'll Do:

• Build a new mobile app and SDK from scratch
• Develop BLE background scanning and NFC activation
• Work on both native iOS and native Android and use Flutter for some basic UI screens.
• Deliver production-ready code with a strong focus on automation testing
• Own technical decisions and project delivery

Tech Stack:

• Kotlin
• Swift
• BLE
• NFC
• Native iOS & Android APIs
• React Native or Flutter (for lightweight UI)

We're Looking For:

• Strong commercial experience with Kotlin and Swift
• Solid BLE experience (highly desirable)
• NFC experience (highly desirable)
• Experience building native mobile applications
• Comfortable owning projects with minimal oversight
• IoT or connected device experience is a bonus

Interview:

One-stage technical interview with engineering leadership, including a walkthrough of a project you've built.